Eben C. Hill 449 
When: the embryo has attained a length of eighty-seven mm. (Fig. 3) 
several of the anterior Wolffian arteries have disappeared and there is 
a decided atrophy of the organ itself. The capsular artery, a name which 
may be applied to that portion of the spermatic artery which supplies 
the albuginea and glandular substance proper, is.seen to give off many 
Fic. 3. Cleared specimen of the right testis, Wolffian body and kidney of 
an embryo pig 87 mm. long, showing descent of testis and atrophy of the an- 
terior Wolffian arteries. X 6. A., dorsal aorta; K., right kidney, 14.7 mm. 
in length; S. A., spermatic artery; W. B., Wolffian body, 9.5 mm. in length; 
W. D., Wolffian and Miillerian ducts; J. A., iliac artery; U. A., umbilical 
artery. 
small branches, some of which are growing over the surface of the organ 
while others are penetrating deeply into the substance of the gland. In 
several specimens of this and later stages the capsular artery is found 
to divide into two main branches immediately after reaching the gland. 
The attachment of the sex gland to the Wolffian body is quite firm at 
this time. 
